A road sign is a sign placed alongside or above a roadway to provide drivers, cyclists, and pedestrians with important information, warnings, or instructions to ensure safety and efficient traffic flow.

Purpose and common uses of road signs
Road signs are essential for traffic control, safety, and guidance, including:

Regulatory signs – Indicate rules that must be followed, such as speed limits, stop signs, or no-parking zones
Warning signs – Alert drivers to potential hazards, like sharp turns, pedestrian crossings, or construction zones
Guide signs – Provide directions, distances, or route information for navigation
Informational signs – Show services like gas stations, hospitals, or rest areas
Road signs are made from durable materials (like aluminum with reflective coatings) to withstand weather and ensure visibility day and night, making them a critical part of road safety and traffic management.